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ZBoss sniffer unable to decrypt all commands.

Hello,I am using ZBoss sniffer + wireshark with TI CC2531 usb dongle for protocol analysis as a substitute for UBIQUA protocol analyser.I followed the instructions given in the video tutorial- https://www.youtube.com/watch?v=QrzyL5PoGA8But it only decrypts few command.And shows "UNKNOWN COMMAND" for rest of the command.